[FIX] web_tour: properly determine consume event for no-type inputs

When checking the consume type of an input element, the type attribute
was checked. Indeed a "text" input has a "input" consume event, while
a "button" input has a "mousedown" consume event. The problem here was
that when the input has no type, the "mousedown" consume event was
chosen while the default type for input is "text" for browsers.

addons/web_tour/static/src/js/tip.js

@@ -263,7 +263,8 @@ var Tip = Widget.extend({
 
 Tip.getConsumeEventType = function ($element) {
     if ($element.is("textarea") || $element.filter("input").is(function () {
-        return !!$(this).attr("type").match(/^(email|number|password|search|tel|text|url)$/);
+        var type = $(this).attr("type");
+        return !type || !!type.match(/^(email|number|password|search|tel|text|url)$/);
     })) {
         return "input";
     }